from Section I - General Principles and a Phenomenology-Based Approach to Movement Disorders and Inherited Metabolic Disorders
Published online by Cambridge University Press: 24 September 2020
Parkinsonism is a syndrome diagnosed by the presence of cardinal motor features, generally defined as bradykinesia in combination with rigidity, resting tremor, flexed (stooped) posture, and freezing and/or impaired postural reflexes [1, 2]. Bradykinesia, the hallmark feature, is determined by the presence of the “sequence effect” (also known as fatiguing or decrement): repetition leads to progressive decrease in speed and/or amplitude of movements [3]. Hypokinesia describes a small amplitude of movements (with or without fatigue) and akinesia literally means “lack of movement.” Hypokinesia is sometimes equated to parkinsonism (as in “infantile hypokinetic–rigid syndrome”), but technically is not the same phenomenon.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.